FKIE_CVE-2021-46932
Vulnerability from fkie_nvd - Published: 2024-02-27 10:15 - Updated: 2026-06-17 04:15
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved:
Input: appletouch - initialize work before device registration
Syzbot has reported warning in __flush_work(). This warning is caused by
work->func == NULL, which means missing work initialization.
This may happen, since input_dev->close() calls
cancel_work_sync(&dev->work), but dev->work initalization happens _after_
input_register_device() call.
So this patch moves dev->work initialization before registering input
device
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * | |
| linux | linux_kernel | * |
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/input/mouse/appletouch.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "d2cb2bf39a6d17ef4bdc0e59c1a35cf5751ad8f4",
"status": "affected",
"version": "5a6eb676d3bc4d7a6feab200a92437b62ad298da",
"versionType": "git"
},
{
"lessThan": "d1962f263a176f493400b8f91bfbf2bfedce951e",
"status": "affected",
"version": "5a6eb676d3bc4d7a6feab200a92437b62ad298da",
"versionType": "git"
},
{
"lessThan": "292d2ac61fb0d9276a0f7b7ce4f50426f2a1c99f",
"status": "affected",
"version": "5a6eb676d3bc4d7a6feab200a92437b62ad298da",
"versionType": "git"
},
{
"lessThan": "a02e1404e27855089d2b0a0acc4652c2ce65fe46",
"status": "affected",
"version": "5a6eb676d3bc4d7a6feab200a92437b62ad298da",
"versionType": "git"
},
{
"lessThan": "975774ea7528b489930b76a77ffc4d5379b95ff2",
"status": "affected",
"version": "5a6eb676d3bc4d7a6feab200a92437b62ad298da",
"versionType": "git"
},
{
"lessThan": "9f329d0d6c91142cf0ad08d23c72dd195db2633c",
"status": "affected",
"version": "5a6eb676d3bc4d7a6feab200a92437b62ad298da",
"versionType": "git"
},
{
"lessThan": "e79ff8c68acb1eddf709d3ac84716868f2a91012",
"status": "affected",
"version": "5a6eb676d3bc4d7a6feab200a92437b62ad298da",
"versionType": "git"
},
{
"lessThan": "9f3ccdc3f6ef10084ceb3a47df0961bec6196fd0",
"status": "affected",
"version": "5a6eb676d3bc4d7a6feab200a92437b62ad298da",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/input/mouse/appletouch.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.23"
},
{
"lessThan": "2.6.23",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.4.*",
"status": "unaffected",
"version": "4.4.298",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.9.*",
"status": "unaffected",
"version": "4.9.296",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"version": "4.14.261",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.224",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.170",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.90",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.13",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "5.16",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "BA4A6C50-3FFF-4800-9BCC-88823A3D2798",
"versionEndExcluding": "4.4.298",
"versionStartIncluding": "2.6.23",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "883CB22B-11DA-4D54-8121-3F5494EDBD4C",
"versionEndExcluding": "4.9.296",
"versionStartIncluding": "4.5.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "B5D4F856-5F69-4F4A-911F-50A21B9A68B6",
"versionEndExcluding": "4.14.261",
"versionStartIncluding": "4.10.0",
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "B34A1353-506A-4AB9-87EC-CD50F09DFB8A",
"versionEndExcluding": "4.19.224",
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.20.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "C87FB3FD-3E74-4588-A1A4-B9BA8AE0C06B",
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{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "083E0940-932B-447B-A6B2-677DAE27FD04",
"versionEndExcluding": "5.15.13",
"versionStartIncluding": "5.11.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: appletouch - initialize work before device registration\n\nSyzbot has reported warning in __flush_work(). This warning is caused by\nwork-\u003efunc == NULL, which means missing work initialization.\n\nThis may happen, since input_dev-\u003eclose() calls\ncancel_work_sync(\u0026dev-\u003ework), but dev-\u003ework initalization happens _after_\ninput_register_device() call.\n\nSo this patch moves dev-\u003ework initialization before registering input\ndevice"
},
{
"lang": "es",
"value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: Entrada: appletouch: inicializa el trabajo antes del registro del dispositivo Syzbot ha informado una advertencia en __flush_work(). Esta advertencia es causada por work-\u0026gt;func == NULL, lo que significa que falta la inicializaci\u00f3n del trabajo. Esto puede suceder, ya que input_dev-\u0026gt;close() llama a cancel_work_sync(\u0026amp;dev-\u0026gt;work), pero la inicializaci\u00f3n dev-\u0026gt;work ocurre _despu\u00e9s_ de la llamada input_register_device(). Entonces este parche mueve la inicializaci\u00f3n dev-\u0026gt;work antes de registrar el dispositivo de entrada"
}
],
"id": "CVE-2021-46932",
"lastModified": "2026-06-17T04:15:53.660",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2021-46932",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-02-27T16:12:57.763250Z",
"version": "2.0.3"
}
}
]
},
"published": "2024-02-27T10:15:07.753",
"references": [
{
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"tags": [
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],
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],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Modified",
"weaknesses": [
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"value": "CWE-665"
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],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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